Article D45-29 of the French Code of Criminal Procedure
Where the application by the accused provided for in article 495-15 seeking the application of the procedure for appearing on appeal on a preliminary admission of guilt shall be sent to the Public Prosecutor more than three months before the date of the hearing set before the court, by registered letter with acknowledgement of receipt, by a secure means of telecommunication in accordance with 21° of Article D. 591 or…